Method and device for isolating an electro-conductive flowing medium

The invention relates to a method and a device for isolating points of an electrically conductive flow medium having a different electrical potential along its flow path, for example in an electrostatic painting system. A voltage isolating device selectively electrically isolates from each other two points (and ) of an electrically conductive flow medium having different electrical potentials along a flow path. The electrically conductive flow medium is conveyed in the inner space (′) of a freely protruding carrier (′) having at least one discharge opening (). The carrier (′) moves back and forth between a first isolating position and a second docking position to allow a transfer flow. The discharge opening () is closed until the docking position has been reached, wherein the discharge opening is opened, and is closed again when the carrier is moved out of the docking position.